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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br />NUCLA AND NUCLA EAST MINES <br />• <br />Location: N 597138.998 E 1,116032.91746 <br />Total Drill Depth (ft) 25.0 <br />Total Well Depth (ft) 23.6 <br />Monitor Well Name GW-N22(1JN0022) Geologic Unit Monitored Alluvium (Calamity Draw) <br />Elevation Ground Level (ft-amsl) 5604.7 <br />Drilling Details <br />N R 16 W S 1 D A C <br />Borehole Diameter (in) h 3/4 Ri9~.peedstar 1500 <br />Bits Tricone Driller Allan Chiles <br />Drilling Fluid Air <br />Additional Details Large cavity at bottom of hole due to caving gravel horizon. <br />Drilling/Construction: Start 07/11/86 Finish 07/12/86 <br />Lithologic Log (Y/N) Y <br />Geophysical Log (Y/N) N <br />Construction Details <br />Casing Specs: Blank 4"id PVC sch40 Perforated 0.05" slot <br />Perforated Interval(s) 4.0' - 23.6' <br />Packer and Cement Basket Set At "lA <br />Cement From 0.0' To 4.0' <br />Bentonite Slurry From NA To <br />Gravel Pack Frum 8.0'(?) Tv 23.6' <br />Additional Details Ran out of gravel before reaching to within 4' of ground <br />surface but gravel was above the water table. <br />Development Sunmiary Air injection for 2 hours making approximately 5 gpm but water <br />never cleaned up at all from an initial muddy red-brown color. <br />. Comments, Problems Tn nrriar to curfara coal tha hnla, a ruhhPr nackar wac chnvpd <br />down 4.0' to the top of the screened interval and then cemented on top to ground <br />surface. <br />1r-2-6 Revised 11/01/86 <br />